Fix: bytes style image issue. (#9304)

### What problem does this PR solve?

#9302

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

rag/llm/cv_model.py

@@ -60,7 +60,7 @@ class Base(ABC):
         if not images:
             return text
 
-        if isinstance(images, str):
+        if isinstance(images, str) or "bytes" in type(images).__name__:
             images = [images]
 
         pmpt = [{"type": "text", "text": text}]